Ventura County is a county in the southern part of the U.S. state of California. As of the 2010 census, 823,318 lived there. The county seat is Ventura.
Ventura County includes Oxnard-Thousand Oaks-Ventura, CA Metropolitan Statistical Area, which is also part of the Los Angeles-Long Beach, CA Combined Statistical Area. It is the southernmost county along the California Central Coast.